Bookcase



FIG. 1 is a perspective view of a bookcase showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a left side elevational view as seen when in use, the otherside being a mirror image thereof.

The rear of the bookcase is flat and unornamented.

The ornamental design for a bookcase, as shown and described.